Monochrome png exports as grayscale antialiased (RESOLVED)

[vtgimp]

I'm presently trying to export a png file as monochrome only, but every time I do, it converts to grayscale antialiased in the saved .png.

Specifically, I save a strictly monochrome 300 dpi bitmap from MTPaint. I can view that image in any image viewer, including in GIMP itself, zoom in, and see that all of the pixels are either black or white. No grays.

In Gimp if I now export that as a png with a new name, the saved png when opened in any viewer now has antialiased greyscale pixels in curved shapes.

If I take that new image back in, and go to colors>image>threshold and again to make it monochrome, succeed at that, then save it as a png, it converts back to antialiased grayscale in the file.

I'd appreciate any advice on how I can simply save a true monochrome .png with Gimp.

Thanks in advance.

[vtgimp]

Hmm, apologies, I think I've got it working by changing modes to grayscale (which I thought I didn't want, by name), but also I think it was partially my fault in trusting the image viewer I was trying the images on. I found that after the mode change and saving a .png again, I still saw the antialiasing in the image viewer zoom-in but if I opened the same file in MTPaint again, it showed true monochrome pixelation when zoomed in.

Apologies again for the above. But glad to be a new member of this forum, because I've used GIMP a fair amount over the last 15 years, and yet have incomplete knowledge of the more sophisticated parts of the program. This looks to be a great resource

[rich2005]

Maybe another way for you if you want "quote...all of the pixels are either black or white. No grays."  ie. no anti-aliasing.

Image -> Mode -> Indexed and choose the 1-bit option. Then export as a png image.